:root {
  --bg: #0b0f14;
  --panel: #111821;
  --panel-2: #151f2a;
  --text: #edf3f8;
  --muted: #9ba9b7;
  --line: #253342;
  --accent: #7dd3fc;
  --accent-2: #a7f3d0;
  --max: 1160px;
  --radius: 22px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background:
    linear-gradient(rgba(125,211,252,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(125,211,252,.025) 1px, transparent 1px),
    var(--bg);
  background-size: 36px 36px;
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}
a { color: inherit; }
.section-shell { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
.site-header {
  width: min(var(--max), calc(100% - 40px)); margin: 18px auto 0;
  min-height: 64px; display: flex; align-items: center; justify-content: space-between;
  position: sticky; top: 14px; z-index: 50; padding: 10px 14px;
  border: 1px solid rgba(255,255,255,.08); border-radius: 18px;
  background: rgba(11,15,20,.82); backdrop-filter: blur(16px);
}
.brand { width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center; text-decoration: none; font-weight: 800; letter-spacing: .04em; background: var(--text); color: var(--bg); }
.nav { display: flex; gap: 24px; align-items: center; }
.nav a { color: var(--muted); text-decoration: none; font-size: .95rem; }
.nav a:hover { color: var(--text); }
.nav-toggle { display: none; }
.hero { min-height: 72vh; display: flex; flex-direction: column; justify-content: center; padding: 110px 0 80px; }
.eyebrow { color: var(--accent); text-transform: uppercase; letter-spacing: .15em; font-weight: 800; font-size: .75rem; }
h1 { font-size: clamp(3.8rem, 10vw, 7.8rem); line-height: .92; letter-spacing: -.06em; margin: 18px 0 26px; }
h2 { font-size: clamp(2rem, 4vw, 3.5rem); line-height: 1.05; letter-spacing: -.035em; margin: 10px 0 16px; }
h3 { line-height: 1.2; }
.hero-copy { max-width: 850px; color: #c6d1dc; font-size: clamp(1.1rem, 2vw, 1.35rem); margin: 0 0 30px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; }
.button { display: inline-flex; align-items: center; justify-content: center; padding: 12px 17px; border: 1px solid var(--line); border-radius: 12px; text-decoration: none; font-weight: 700; background: rgba(255,255,255,.025); }
.button:hover { border-color: #4b657e; transform: translateY(-1px); }
.button.primary { background: var(--text); color: var(--bg); border-color: var(--text); }
.signal-strip { margin-top: 52px; display: flex; flex-wrap: wrap; gap: 8px; }
.signal-strip span, .tag-row span { padding: 6px 9px; border-radius: 8px; border: 1px solid var(--line); color: var(--muted); font-size: .8rem; background: rgba(255,255,255,.02); }
.section-heading { max-width: 840px; margin-bottom: 34px; }
.section-heading p, .about-card p, .contact-section p { color: var(--muted); }
#projects, #skills, #about, #contact { padding: 88px 0; }
.project-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.project-card { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: var(--panel); }
.project-card.featured { grid-column: span 2; display: grid; grid-template-columns: 1.1fr .9fr; }
.project-visual { min-height: 250px; position: relative; overflow: hidden; border-bottom: 1px solid var(--line); background: #0d141c; }
.featured .project-visual { min-height: 410px; border-bottom: 0; border-right: 1px solid var(--line); }
.visual-label { position: absolute; left: 18px; top: 16px; z-index: 2; color: #cbd6e1; font-size: .75rem; text-transform: uppercase; letter-spacing: .12em; }
.project-body { padding: 24px; }
.featured .project-body { display: flex; flex-direction: column; justify-content: center; padding: 34px; }
.project-kicker { color: var(--accent); font-size: .8rem; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; }
.project-body h3 { font-size: 1.5rem; margin: 10px 0 12px; }
.project-body p { color: var(--muted); margin: 0 0 18px; }
.tag-row { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 22px; }
.text-link { color: var(--text); font-weight: 800; text-decoration: none; }
.text-link:hover { color: var(--accent); }
.visual-microscope { background: radial-gradient(circle at 70% 25%, rgba(125,211,252,.16), transparent 30%), linear-gradient(145deg,#111c28,#0a1118); }
.schematic-lines { position: absolute; inset: 18% 10%; border: 1px solid rgba(125,211,252,.28); border-radius: 18px; box-shadow: 70px 50px 0 -20px rgba(125,211,252,.10), -60px 100px 0 -35px rgba(167,243,208,.12); }
.schematic-lines:before,.schematic-lines:after { content:""; position:absolute; background:rgba(125,211,252,.45); }
.schematic-lines:before { width: 70%; height:1px; left:15%; top:48%; }
.schematic-lines:after { width:1px; height:70%; left:48%; top:15%; }
.visual-emg { background: linear-gradient(135deg,#121923,#101722); }
.pulse-line { position:absolute; left:8%; right:8%; top:50%; height:2px; background:linear-gradient(90deg,transparent,var(--accent),var(--accent-2),transparent); transform:skewY(-8deg); box-shadow: 0 0 28px rgba(125,211,252,.45); }
.visual-rf { background: radial-gradient(circle at center, rgba(125,211,252,.14), transparent 8%, transparent 100%), #0e151d; }
.rf-rings { position:absolute; width:90px; height:90px; border:1px solid rgba(125,211,252,.65); border-radius:50%; top:50%; left:50%; transform:translate(-50%,-50%); box-shadow:0 0 0 40px rgba(125,211,252,.10),0 0 0 80px rgba(125,211,252,.055),0 0 0 120px rgba(125,211,252,.025); }
.visual-controls { background: linear-gradient(180deg,#101822,#0c1218); }
.response-curve { position:absolute; left:10%; right:10%; bottom:25%; height:38%; border-left:1px solid rgba(255,255,255,.25); border-bottom:1px solid rgba(255,255,255,.25); }
.response-curve:after { content:""; position:absolute; left:4%; top:58%; width:92%; height:2px; background:linear-gradient(90deg,var(--accent),var(--accent-2)); transform:skewY(-13deg); box-shadow:0 0 20px rgba(125,211,252,.35); }
.split-section { display:grid; grid-template-columns:.8fr 1.2fr; gap:64px; }
.skill-groups { display:grid; grid-template-columns:1fr 1fr; gap:14px; }
.skill-groups>div { padding:20px; border:1px solid var(--line); border-radius:16px; background:var(--panel); }
.skill-groups h3 { margin:0 0 8px; }
.skill-groups p { margin:0; color:var(--muted); }
.about-card { display:grid; grid-template-columns:.8fr 1.2fr; gap:64px; padding-left:28px!important; padding-right:28px!important; border:1px solid var(--line); border-radius:var(--radius); background:linear-gradient(135deg,var(--panel),var(--panel-2)); }
.contact-section { text-align:center; }
.contact-section .hero-actions { justify-content:center; }
.site-footer { padding: 34px 0 50px; border-top:1px solid var(--line); display:flex; justify-content:space-between; gap:20px; color:var(--muted); font-size:.9rem; }
.server-note { color: var(--accent-2); }

/* Case-study pages */
.case-hero { padding: 110px 0 40px; }
.case-hero h1 { font-size: clamp(2.7rem, 7vw, 5.5rem); max-width: 1000px; }
.case-lede { max-width: 820px; color: var(--muted); font-size:1.15rem; }
.case-grid { display:grid; grid-template-columns: 240px 1fr; gap:60px; padding: 30px 0 90px; }
.case-sidebar { position:sticky; top:100px; align-self:start; }
.case-sidebar a { display:block; color:var(--muted); text-decoration:none; padding:6px 0; }
.case-sidebar a:hover { color:var(--text); }
.case-content section { margin-bottom:56px; }
.case-content h2 { font-size:2rem; }
.case-content p, .case-content li { color:#bac6d1; }
.architecture { padding:26px; border:1px solid var(--line); border-radius:18px; background:var(--panel); font-family: ui-monospace,SFMono-Regular,Menlo,monospace; color:#d8e4ee; overflow:auto; }
.placeholder { min-height:280px; border:1px dashed #3a4a5b; border-radius:18px; display:grid; place-items:center; text-align:center; color:var(--muted); padding:30px; background:rgba(255,255,255,.015); }
.callout { border-left:3px solid var(--accent); padding:4px 0 4px 18px; color:#cbd6e1; }
.back-link { color:var(--muted); text-decoration:none; }
.back-link:hover { color:var(--text); }

@media (max-width: 820px) {
  .nav-toggle { display:block; background:transparent; border:1px solid var(--line); color:var(--text); padding:9px 12px; border-radius:10px; }
  .nav { display:none; position:absolute; top:64px; left:0; right:0; padding:18px; flex-direction:column; align-items:flex-start; background:#0d131a; border:1px solid var(--line); border-radius:14px; }
  .nav.open { display:flex; }
  .project-grid { grid-template-columns:1fr; }
  .project-card.featured { grid-column:auto; display:block; }
  .featured .project-visual { min-height:280px; border-right:0; border-bottom:1px solid var(--line); }
  .split-section, .about-card, .case-grid { grid-template-columns:1fr; gap:28px; }
  .skill-groups { grid-template-columns:1fr; }
  .case-sidebar { position:static; }
  .site-footer { flex-direction:column; }
}